Elucidating plasma dynamics in Hasegawa-Wakatani turbulence by information geometry

The impact of adiabatic electrons on drift-wave turbulence, modelled by the Hasegawa-Wakatani equations, is studied using information length. Information length is a novel theoretical method for measuring distances between statistical states represented by different probability distribution function...

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Bibliographic Details
Published inarXiv.org
Main Authors Anderson, Johan, Eun-jin, Kim, Hnat, Bogdan, Rafiq, Tariq
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 01.08.2019
Subjects
Adiabatic flow
Distribution functions
Physics - Data Analysis, Statistics and Probability
Physics - Plasma Physics
Plasma dynamics
Probability distribution functions
Statistical analysis
Time dependence
Turbulence
Variation
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Summary:The impact of adiabatic electrons on drift-wave turbulence, modelled by the Hasegawa-Wakatani equations, is studied using information length. Information length is a novel theoretical method for measuring distances between statistical states represented by different probability distribution functions (PDFs) along the path of a system. Specifically, the time-dependent PDFs of turbulent fluctuations for a given adiabatic index \(A\) is computed. The changes in fluctuation statistics are then quantified in time by using information length. The numerical results provide time traces exhibiting intermittent plasma dynamics, and such behaviour is identified by a rapid change in the information length. The effects of \(A\) are discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.1908.01006